-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 PPX6XpBB1aQ7Z70gG3kBalt53KuDlq5kI8kwnut9PH8kUhg6O9uFoFj5zNyIr0No
 AYwgznlLZYptVqVCzZ62Pg==

<SEC-DOCUMENT>0001264385-04-000011.txt : 20040204
<SEC-HEADER>0001264385-04-000011.hdr.sgml : 20040204
<ACCEPTANCE-DATETIME>20040204142037
ACCESSION NUMBER:		0001264385-04-000011
CONFORMED SUBMISSION TYPE:	5
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20031231
FILED AS OF DATE:		20040204

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			LAFARGE NORTH AMERICA INC
		CENTRAL INDEX KEY:			0000716783
		STANDARD INDUSTRIAL CLASSIFICATION:	CEMENT, HYDRAULIC [3241]
		IRS NUMBER:				581290226
		STATE OF INCORPORATION:			MD
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		12950 WORLDGATE DR. SUITE 500
		CITY:			HERNDON
		STATE:			VA
		ZIP:			20170
		BUSINESS PHONE:		7034803600

	MAIL ADDRESS:	
		STREET 1:		12950 WORLDGATE DR. SUITE 500
		CITY:			HERNDON
		STATE:			VA
		ZIP:			20170

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			GRANT KEVIN C
		CENTRAL INDEX KEY:			0001278662

	FILING VALUES:
		FORM TYPE:		5
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-08584
		FILM NUMBER:		04566187

	BUSINESS ADDRESS:	
		STREET 1:		C/O LAFARGE NORTH AMERICA
		STREET 2:		12950 WORLDGATE DR. #500
		CITY:			HERNDON
		STATE:			VA
		ZIP:			20170
		BUSINESS PHONE:		7034803600

	MAIL ADDRESS:	
		STREET 1:		C/O LAFARGE NORTH AMERICA
		STREET 2:		12950 WORLDGATE DR. #500
		CITY:			HERNDON
		STATE:			VA
		ZIP:			20170
</SEC-HEADER>
<DOCUMENT>
<TYPE>5
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0201</schemaVersion>

    <documentType>5</documentType>

    <periodOfReport>2003-12-31</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <form3HoldingsReported>0</form3HoldingsReported>

    <form4TransactionsReported>0</form4TransactionsReported>

    <issuer>
        <issuerCik>0000716783</issuerCik>
        <issuerName>LAFARGE NORTH AMERICA INC</issuerName>
        <issuerTradingSymbol>LAF</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001278662</rptOwnerCik>
            <rptOwnerName>GRANT KEVIN C</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O LAFARGE NORTH AMERICA</rptOwnerStreet1>
            <rptOwnerStreet2>12950 WORLDGATE DR. #500</rptOwnerStreet2>
            <rptOwnerCity>HERNDON</rptOwnerCity>
            <rptOwnerState>VA</rptOwnerState>
            <rptOwnerZipCode>20170</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Vice President</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <ownerSignature>
        <signatureName>William G. Miller, signed pursuant to authorization previously filed</signatureName>
        <signatureDate>2004-02-04</signatureDate>
    </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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